Fuel supply device

Abstract

When a fuel tank is inclined at a negative slope and tilted to the right side, it may be tilted such that a position of a mesh member is relatively higher than a position of a vapor outlet of a vapor outlet passage. In this case, air may enter into a leak passage from an outlet port such that interfacial tension is generated in the mesh member. The interface between fuel and air is present at the mesh member, and the interfacial tension generated at the interface serves to prevent air from entering into a discharge pipe.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]The present application is a U.S. National Phase entry of, and claims priority to, PCT Application No. PCT / JP2017 / 002076, filed Jan. 23, 2017, which claims priority to Japanese Patent Application No. 2016-029969, filed Feb. 19, 2016, both of which are hereby incorporated herein by reference in their entireties for all purposes.STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT[0002]Not applicable.BACKGROUND[0003]The present disclosure relates to a fuel supply device that is installed into a fuel tank and serves to supply fuel from within the fuel tank to an internal combustion engine.[0004]Conventionally, a fuel tank for storing fuel such as gasoline is mounted on an automobile (vehicle). A fuel supply device configured to supply fuel from the tank to an engine (internal combustion engine) as disclosed in Japanese Laid-Open Patent Publication No. 2009-144542 is installed inside the fuel tank. The fuel supply device generally ...

AI Technical Summary

Benefits of technology

[0009]According to the fuel supply device of the first embodiment of the present disclosure, since the mesh member capable of generating interfacial tension with respect to the interface produced between fuel and air is arranged in the leak passage, it is possible to prevent air from entering upstream from said member into the leak passage, because of the interfacial tension generated by the mesh member. As a result, the function for reducing the “liquid drop” effect caused when the pump-up operation of the pump is stopped due to contact of the fuel supply passage with air as explained above, is achieved, while at the same time the increase in number of components is avoided, to achieve the dual effect of ensuring the excellent starting ability of an engine while providing a durable fuel supply device at low cost.

[0023]According to the fuel filter device according to the eighth embodiment, since the fuel discharge port and the vapor outlet are oriented to outlet to the filter which through the fuel pumped up by the pump, clean fuel, which has been filtered once by the fuel filter, is returned again to the fuel filter, therefore, enhancing the filtering efficiency of the fuel filter and enhancing the quality of fuel provided to the engine.

Problems solved by technology

In this condition, with not enough liquid fuel supplied the ignitability of the engine suffers, and the starting ability of an engine will be significantly diminished.

However, in this approach, the number of components for the fuel supply device increases, and the overall manufacturing cost of the fuel supply device will be more expensive with reduced durability when the check valves are provided at each location.

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